package com.ruoyi.framework.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.handler.TenantLineHandler;
import com.baomidou.mybatisplus.extension.plugins.inner.BlockAttackInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.TenantLineInnerInterceptor;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.framework.config.properties.TenantProperties;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.expression.StringValue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * Mybatis Plus 配置
 *
 * @author ruoyi
 */
@EnableTransactionManagement(proxyTargetClass = true)
@Configuration
public class MybatisPlusConfig {
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // 多租户插件（注意：这个一定要放在最上面）
        interceptor.addInnerInterceptor(tenantLineInnerInterceptor());
        // 分页插件
        interceptor.addInnerInterceptor(paginationInnerInterceptor());
        // 乐观锁插件
        interceptor.addInnerInterceptor(optimisticLockerInnerInterceptor());
        // 阻断插件
        interceptor.addInnerInterceptor(blockAttackInnerInterceptor());
        return interceptor;
    }

    public TenantLineInnerInterceptor tenantLineInnerInterceptor() {

        return new TenantLineInnerInterceptor(new TenantLineHandler() {
            /**
             * 获取租户ID
             *
             * @return 租户ID
             */
            @Override
            public Expression getTenantId() {
                if (SecurityUtils.getLoginUser() != null) {
                    String tenantId = SecurityUtils.getLoginUser().getTenantId();
                    if (!StringUtils.isEmpty(tenantId)) {
                        return new StringValue(tenantId);
                    }
                }
                return new StringValue(TenantProperties.getInstance().getDefaultTenantId());
            }

            /**
             * 获取租户字段名称
             *
             * @return 租户字段名称
             */
            @Override
            public String getTenantIdColumn() {
                return TenantProperties.getInstance().getColumn();
            }

            /**
             * 过滤租户表
             *
             * @param tableName 表名
             * @return 是否进行过滤 返回true 表示不进行多租户处理
             */
            @Override
            public boolean ignoreTable(String tableName) {
                if (!TenantProperties.getInstance().getEnable()) {
                    return true;
                }
                return TenantProperties.getInstance().getIgnoreTables().contains(tableName);
            }
        });
    }

    /**
     * 分页插件，自动识别数据库类型 https://baomidou.com/guide/interceptor-pagination.html
     */
    public PaginationInnerInterceptor paginationInnerInterceptor() {
        PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor();
        // 设置数据库类型为mysql
        paginationInnerInterceptor.setDbType(DbType.MYSQL);
        // 设置最大单页限制数量，默认 500 条，-1 不受限制
        paginationInnerInterceptor.setMaxLimit(-1L);
        return paginationInnerInterceptor;
    }

    /**
     * 乐观锁插件 https://baomidou.com/guide/interceptor-optimistic-locker.html
     */
    public OptimisticLockerInnerInterceptor optimisticLockerInnerInterceptor() {
        return new OptimisticLockerInnerInterceptor();
    }

    /**
     * 如果是对全表的删除或更新操作，就会终止该操作 https://baomidou.com/guide/interceptor-block-attack.html
     */
    public BlockAttackInnerInterceptor blockAttackInnerInterceptor() {
        return new BlockAttackInnerInterceptor();
    }
}